Melamine-(H2SO4)(3)/melamine-(HNO3)(3) instead of H2SO4/HNO3: a safe system for the fast oxidation of thiols and sulfides under solvent-free conditions

作者：Chehardoli Gholamabbas^*; Zolfigol Mohammad Ali

来源：Journal of Sulfur Chemistry, 2015, 36(6): 606-612.

DOI：10.1080/17415993.2015.1074688

• melamine-(H2SO4)(3)
• melamine-(HNO3)(3)
• oxidation
• thiols
• sulfides

Melamine reacted with neat sulfuric acid and fuming nitric acid readily to form two new organic solid acids, namely melamine-(H2SO4)(3) and melamine-(HNO3)(3). Mixture of them acts as a unique powerful system instead of a hazardous H2SO4/HNO3 system for the direct oxidation of thiols. Also, this system can oxidize the sulfides in the presence of a catalytic amount of KBr and few drops of water. This procedure offers advantages such as very low reaction time, simple work-up, excellent yield and matching with some green chemistry protocols.
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• 出版日期2015-11-2